THE STRUCTURE OF ZEOLITE ZSM-23 (MTT) REFINED FROM SYNCHROTRON X-RAY-POWDER DATA

被引：33

作者：

MARLER, B

DEROCHE, C

GIES, H

FYFE, CA

GRONDEY, H

KOKOTAILO, GT

FENG, Y

ERNST, S

WEITKAMP, J

COX, DE

机构：

[1] UBC,DEPT CHEM,VANCOUVER,BC,CANADA

[2] UNIV STUTTGART,INST CHEM TECHNOL I,W-7000 STUTTGART 80,GERMANY

[3] BROOKHAVEN NATL LAB,UPTON,NY 11973

来源：

JOURNAL OF APPLIED CRYSTALLOGRAPHY | 1993年 / 26卷 / pt 5期

关键词：

Crystal structure - Crystal symmetry - Crystallization - Crystallography - Metal refining - Silicates - Synchrotron radiation - Synthesis (chemical) - X ray analysis;

D O I：

10.1107/S0021889893002006

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The structure of zeolite ZSM-23 (structure-type code MTT) loaded with NH4F [a(o) = 11.129 (1), b(o) = 5.025 (1) and c(o) = 21.519 (1) angstrom and beta = 89.85 (4)-degrees] was refined from high-resolution synchrotron X-ray powder data. The Rietveld refinement converged in space group P12(1)1 (No. 4) to R(F) = 0.090 and R(wp) = 0.085, confirming the proposed model of the silicate framework. The use of complementary methods (synchrotron X-ray powder diffraction, Si-29 magic-angle-spinning, nuclear-magnetic-resonance spectroscopy, and distance and angle least-squares refinements) was essential for the determination of the true space-group symmetry, a prerequisite for the successful Rietveld structure refinement.

引用

页码：636 / 644

页数：9

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